zer was applied to plots 2, 3, 11, and 12, after the second 

 year. 



Potash compared with Phosphoric Acid. 



Plots 17 and 18 had only materials containg potash. 



Plots 15 had ashes, a fertilizer containing but little aside 

 from' potash. 



Plots 20, 21, 23, and 27, had phosphoric acid in various 

 forms. 



Plots 4 and 5 had prepared fertilizers. 



No. 8 had no nitrogen. 



No. 9 had no potash. 



No" I had no phosphoric acid. 



Nos. 10 and 26 were complete chemicals, while Nos. 6, 

 16, 19 and 24 had no fertilizer of any kind. The following ta- 

 ble gives the average results from these groups. The fifth col- 

 umn being obtained by adding the three crops to an assumed 

 crop for the second year equaling first year. The sixth column 

 shows the gain in four years, duetto $24.00 worth of fertilizer, 

 each application being $8.00 per acre. 



Value of crops from plots fertilized 

 ways, {per acre). 



in various 



I Plots. 



Average from potash 

 alone, 



Nothing, 



Phosphoric acid alone. 



Phosphoric acid a>.d \ 

 potash, 1 



Phosphoric acid and 1 

 Nitrogen, 1 



Phosphoric acid, pot- ( 

 ash and nitrogen, I 



Prepared or commer- 

 cial fertilizers, 



Complete chemicals, 



Potash and nitrogen, 

 Ashes, 



Hay. 



$^5.87 

 18.00 



17.19 



20.00 

 12.50 

 iq.50 

 17. 12 



19.62 



15-00 

 26.35 



Total 

 three 

 years. 



594.74 



70.07 



w • 



a-o « 

 lU c - 



>. N 1) 



O c4 C 



HE J3 



I a o 



$133.21 



96.77 



73.66 100.87 



111.43 

 56.99 



103-95 

 95-67 



108.56 



101.79 

 107.94 



164.36 

 7'-33 

 154.30 

 •39-97 

 164.15 



'57-43 

 158-73 



> w 



O > 



..> w i> 

 ir -u N 



1 •'" 



> o S 



! 0.3 



1 p u 



^36.44; 51.52 



4.10 0.17 



67.59^ 



loss, i 



57.53; 

 43.20 



67.38! 

 bo. 00 1 



2.81 



2.39 

 I 80 



3.80 

 2.51 



61.961 2.S 



Phosphoric acid alone gives practically no increase of crop 

 over unmanured plots. Potash alone gives a substantial in- 



17 



